Japanese Radar Type Designation Systems

Tzoli

Tzoli

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I've tried to collect the WW2 Japanese radar Type designation systems with data and if possible photos and drawings.

Japanese radar were designated by Mark (Go), which indicated the intended use; Model (Kei/Kata/Gata); Modification (Kai); and Type (Shiki). Mark 1 was ground based search and early warning radar; Mark 2 was shipboard search and early warning radar; Mark 3 was shipboard fire control radar; Mark 4 was antiaircraft fire control radar; Mark 5 was panoramic indication/airborne/search radar; and Mark 6 was ground controlled interception radar. Type 1 was fixed radar, Type 2 was mobile radar, and Type 3 was portable radar. Type 4 may have referred to airborne radar. Mark and Type were combined into a single two-digit designation, such as 11 for fixed ground-based early warning radar. There is significant confusion in the English literature due to various translations of these terms, including the frequent translation of the designation as Type.
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2号電波探信儀3型 (S8,S8A) : 日本帝国陸海軍電探開発史

2号電波探信儀3型 (S8,S8A)の解説諸元表略称--------------------------------------------- S8 目的---------------------------------------------艦船用対水上射撃用周波数 ----------------------------------------- 518Mcs繰返周波数---------------------------------
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ブログバトン : 日本帝国陸海軍電探開発史

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Type 11
Japanese designation: Mark 1 Model 1 Type 0-3
Role: land based early warning / air search radar
Wavelength: 300 cm
Pulse width: 20 microseconds
Pulse repetition frequency: 500 or 1000 Hz
Peak Output: 5 kW (Types 0-1)
40 kW (Types 2-3)
Transmitter: parallel two wire
Receiver: UN-954
Detector: RE-3
Detected: aircraft, group at 250 km, single at 130 km
Weight: 8.700 kg
Antennae: dipole array with 4.3m by 8.8m mattress of two layers of three horizontal dipoles type reflector, send and receive separate use
Display: A scope
Accuracy: 5 degrees
Resolution: 25 degrees
https://imgur.com/CR4LAt1
View: https://i.imgur.com/CR4LAt1.jpg

https://imgur.com/ujSvC6B
View: https://i.imgur.com/ujSvC6B.jpg

Mark 1 Model 1 Type 2:
https://imgur.com/YeWkGQQ
View: https://i.imgur.com/YeWkGQQ.jpg

https://imgur.com/oeuZqZJ
View: https://i.imgur.com/oeuZqZJ.jpg

https://imgur.com/TBLWa2e
View: https://i.imgur.com/TBLWa2e.jpg

https://i.imgur.com/gj4a9RH.jpg
https://i.imgur.com/X3g1eTp.jpg
https://i.imgur.com/SfEOIsd.jpg
Mark 1 Model 1 Type 3:
https://i.imgur.com/p4fxsKg.jpg

Type 12
Japanese designation: Mark 1 Model 2 Type 0-2
Role: land based mobile air search radar
Wavelength: 200 cm and 150 cm
Pulse width: 10 microseconds
Peak Output: 5 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: RE-3
Detected: Aircraft, group at 100 km, single at 50 km
Weight: 6.000 kg
Antennae: dipole array with 4.3m by 8.8m mattress of two layers of three horizontal dipoles type reflector, send and receive separate use
Display: A scope
Mark 1 Model 2 Type 2:

Type 13
Japanese designation: Mark 1 Model 3 Type 0-3
Role: land,ship,submarine based air search radar
Wavelength: 200 cm
Pulse Width: 10 microsecond
Pulse Repetition Frequency: 500 Hz
Peak Output: 10 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: n/a
Detected: aircraft, group at 100 km, single at 50 km
Weight: 110 kg
Antennae: transmitter is dipole array with yagi mattress type receiver, send and receive. common use
Mark 1 Model 3 Type 3:

Type 14
Japanese designation: Mark 1 Model 4
Role: land,ship? based air search radar
Wavelength: 600 cm
Peak Output: 100 kw
Pulse Width: 20 microsecond
Pulse Repetition Frequency: 250 Hz
Transmitter: parallel two wire
Receiver: UN-954
Detector: n/a
Detected: aircraft, group at 360 km, single at 250 km
Weight: 30.000kg
Antennae: Large structure with a two-element half-wavelength Yagi antenna with a width of 6m, a height of 7m, and a depth of 4.7m.

Type 21
Japanese designation: Mark 2 Model 1 Type 0-2
Role: ship based air/surface search radar
Wavelength: 150 cm
Pulse Width: 10 microsecond
Pulse Repetition Frequency: 500/1000 Hz
Peak Output: 5 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: RE-3
Detected: aircraft, group at 100 km, single at 70 km, surface ship (large) 20 km
Weight: 840 kg
Antennae: dipole array with two horizontal sets of four dipoles (transmitter) and two horizontal sets of three dipoles (receiver) type reflector, send and receive separate use
Display: A scope
Accuracy: 1-2 km
Resolution: 2000 meters/20 degrees

Type 22
Japanese designation: Mark 2 Model 2
Role: ship,submarine based surface+air search radar + fire control
Wavelength: 10 cm
Pulse Width: 2-10 microsecond
Pulse Repetition Frequency: 2500 Hz
Scan rate: 5 rotations per minute
Peak Output: 2 kw
Transmitter: magnetron
Receiver: crystal
Detector: n/a
Detected: aircraft, group at 35 km, single at 17 km, surface ship (large) 34.5 km
Weight: surface ships 1.320 kg, submarines 2.140 kg
Antennae: horn type, send and receive separate use
Display: A scope
Accuracy: 200 meters/3 degrees
Resolution: 1500 meters/40 degree

Type 23 (Copy of Wurzburg)
Japanese designation: Mark 2 Model 3
Role: ship based surface fire control radar
Wavelength: 60 cm
Pulse Width: 2,5 microsecond
Pulse Repetition Frequency: 3750 Hz
Peak Output: 5 kw
Transmitter: cavity resonance
Receiver: 2400
Detector: n/a
Detected: small surface ships 13 km
Weight: 1.000 kg
Antennae: 1,7m parabola dish, send and receive common use

Type 31
Japanese designation: Mark 3 Model 1
Role: land,ship based surface fire control radar
Wavelength: 10 cm
Peak Output: 2 kw
Transmitter: magnetron
Receiver: crystal
Detector: n/a
Detected: large surface ships 35 km
Weight: 5.000 kg
Antennae: parabola, send and receive common use

Type 32
Japanese designation: Mark 3 Model 2
Role: land,ship based surface fire control radar
Wavelength: 10 cm
Pulse Width: 10 microsecond
Pulse Repetition Frequency: 2500 Hz
Peak Output: 2 kw
Transmitter: magnetron
Receiver: crystal
Detector: n/a
Detected: large surface ships 30-35 km small surface ship 12km
Weight: 1.000kg
Antennae: square horn, send and receive separate use, Transmitter: single horn, Receiver: Pair of horns employing lobe switching
Display: A scope

Type 33
Japanese designation: Mark 3 Model 3
Role: ship based surface fire control radar
Wavelength: 10 cm
Peak Output: 2 kw
Transmitter: magnetron
Receiver: crystal
Detector: n/a
Detected: small surface ship 13 km
Weight: 800 kg
Antennae: round horn, send and receive separate use

Type 41 (Copy of the SCR-268)
Japanese designation: Mark 4 Model 1
Role: land based Air search and AA fire control radar
Wavelength: 150 cm
Pulse Width: 3 microsecond
Pulse Repetition Frequency: 1000 Hz
Peak Output: 13 kw
Transmitter: ring parallel two wire
Receiver: UN-954
Detector: n/a
Detected: aircraft, group at 40 km, single at 20 km
Weight: 5.000
Transmitter: 2x4 dipoles, Azimuth receiver: 2x4 dipoles, Elevation receiver: 6 dipoles
Distance accuracy: 100m / 1 degree

Type 42 (Copy of the GL MARK II)
Japanese designation: Mark 4 Model 2 Type 0-2
Role: land,ship based AA fire control radar
Wavelength: 150 cm
Pulse width: 3 microseconds
Pulse repetition frequency: 2000 Hz
Peak Output: 13 kw - 25 Kw (Type 2)
Transmitter: ring parallel two wire Receiver: UN-954
Detector: n/a
Detected: aircraft, group at 40 km, single at 20 km
Weight: 5.000 kg
Antennae: Transmitter: 4 Yagi, Azimuth receiver: 4 Yagi
Distance accuracy: 50m / 1 degree
Mark 4 Model 2 Type 2:

Type 43
Japanese designation: Mark 4 Model 3
Role: land based searchlight control radar
Wavelength: 150 cm
Pulse width: 4-3 microseconds (L1-2/3)
Peak Output: 7-10-13 kw (L1-2-3)
Transmitter: ring parallel two wire
Receiver: UN-954
Detector: n/a
Detected: aircraft, group and single at 40 km
Weight: 500 kg
Antennae: Transmission 1x Yagi type, Receive 4x Yagi type, send and receive separate use
Distance accuracy: 100m / 1,5 degree
Mark 4 Model 3 Type L1:
Mark 4 Model 3 Type L2:

Type 51
Japanese designation: Mark 5 Model 1
Role: air based naviagational/target detection radar
Wavelength: 10 cm
Peak Output: 6 kw
Transmitter: magnetron
Receiver: crystal
Detector: n/a
Detected: unknown, possibly earth or ocean surface, 20 km
Weight: 200 kg
Antennae: parabola, send and receive common use

Type 61
Japanese designation: Mark 6 Model 1
Role: land based height and direction finder radar
Wavelength: 60 cm
Peak Output: 10 kw
Transmitter: shielded oscillator
Receiver: 2400
Detector: n/a
Detected: single aircraft 130 km
Weight: 15.000 kg
Antennae: parabola, send and receive common use

Type 62
Japanese designation: Mark 6 Model 2
Role: land based friendly direction finder radar (Friend Or Foe?)
Wavelength: 200 cm
Peak Output: 10 kw
Transmitter: parallel two wir
Receiver: UN-954
Detector: n/a
Detected: single aircraft 100+ km
Weight: 3.000 kg
Antennae: dipole array, send and receive common use

Type 63
Japanese designation: Mark 6 Model 3
Role: land basedheight and direction finder radar
Wavelength: 300 cm
Peak Output: 40 kw
Transmitter: parallel two wire
Receiver: UN-954
Detector: RE-3
Detected: single aircraft 160 km
Weight: 8.700 kg
Antennae: dipole array, send and receive common use
Mark 6 Model 3 Type 4:
 
Japanese Radar Systems in World War II

Introduction

Like the rest of Japanese military equipment during the WW II period there were two nearly completely separate lines of development in radar and associated electronics systems. One line was developed by the Imperial Army, the other by the Imperial Navy. While there was a bit of overlap in radar equipment, research and, development each service performed most of this completely independent of the other to the extent that even companies working for both services were required to dedicate separate facilities to each service with no technical cross-trading between them!

Each service also developed its own system of nomenclature in designating radar systems.

The Army System:
Japanese Army radars were designated either Tachi (meaning land from tsuchi “chi” for earth and “Ta” for Tama for the Tama Institute the lead developer for the Army), Tase for shipboard systems (“se” from misui or water) or, Taki for airborne systems (“ki” from kuki or air) followed by a numeral designation. There was no differentiation in function between system designations. That is, fire-control radar was not distinguished from search sets.

The Navy System:
The Japanese Navy adopted the term Dentan (from Denpa for electronic wave and Tanshingi for detection / search). Each set was designated by type and function (Gô), model (Gata), and modification (Kai). The Gô types were:

1 Gô Land air search / early warning
2 Gô Shipboard air search / early warning
3 Gô Shipboard surface search and fire control
4 Gô Land anti-aircraft fire control
5 Gô Airborne radar sets
6 Gô Other sets

For example: The 1 Gô 1 Gata Dentan radar would be a model 1 land air search / early warning type radar. For brevity the designations in use would often be shortened to 11 Gô Dentan for the example.

Japanese Naval Radars Described:

1 Gô 1 Gata Fixed position air search radar, land based.
Wavelength: 3m
Frequency: 100 MHz (in operation this varied from 92 – 108 MHz)
PRF: 750 (varying in use from 530 to 1250)
Pulse length: 10 – 30 µsec
Peak power: 40kw
DRange: 1 – 2 km
DBearing:
Antenna type:
Production: 30 units
Development: Development began pre-war. All sets delivered prior to December 1941.
Performance: Group of aircraft 250 km, single aircraft 130 km

1 Gô 2 Gata Land based mobile air search radar
Wavelength: 1.5m
Frequency: 200 MHz (in operation this varied from 187 – 214 MHz)
PRF: 1000 (varying in use from 750 to 1500)
Pulse length: 3 – 20 µsec
Peak power: 5kw
DRange: 1 – 2 km
DBearing:
Antenna type: Mattress
Production: 300 units
Development: Development began pre-war.
Performance: Group of aircraft 100 km, single aircraft 50 km, surface search 18km.
Notes: Uses UN 954 detector circuit. Transmitter uses 2C oscillator with 2 T-310 tubes.

1 Gô 3 Gata Mobile land based air search early warning
Wavelength: 2m
Frequency: 150 MHz (in operation this varied from 146 – 165 MHz)
PRF: 500 (varying in use from 400 to 600)
Pulse length: 10 µsec (3 – 12 µsec in service)
Peak power: 10kw
DRange: 2 – 3 km
DBearing: 10°
Antenna type: Mattress
Production: 1000 units
Development: Developed from the army
Performance: Group of aircraft 100 km, single aircraft 50 km, surface search 18km.
Notes: Uses UN 954 RE-3 detector circuit. Transmitter uses 2C oscillator with 2 T-311 tubes.

1 Gô 4 Gata Land based air search radar
Wavelength: 6 m
Frequency:
PRF:
Pulse length:
Peak power:
DRange:
DBearing:
Antenna type:
Beam dimensions:
Production:
Development:
Performance: Group of aircraft 450 km, single aircraft 250 km,
Notes:

2 Gô 1 Gata 1 Kai Shipboard air search radar
Wavelength: 1.5m
Frequency: 200 MHz (in operation this varied from 187 – 214 MHz)
PRF: 1000 (varying in use from 750 to 1500)
Pulse length: 3 – 20 µsec
Peak power: 5kw
DRange: 1 – 2 km
DBearing: 20°
Antenna type: Mattress 6 Gata antenna
Beam dimensions: 34° x 60°
Production: units
Development: August 1942
Performance: Group of aircraft 100 km, single aircraft 50 km, surface search 18km.
Notes: Development of the 1 Gô 2 Gata Dentan land based radar. Installed on many major fleet units from August 1942 onward.

2 Gô 1 Gata 2 Kai Shipboard air search radar
Wavelength: 1.5m
Frequency: 200 MHz (in operation this varied from 187 – 214 MHz)
PRF: 1000 (varying in use from 750 to 1500)
Pulse length: 3 – 20 µsec
Peak power: 5 kW
DRange: 1 – 2 km
DBearing:
Antenna type: Mattress 6 Gata antenna
Beam dimensions: 34° x 60°
Production: units
Development: April 1943
Performance: Group of aircraft 100 km, single aircraft 50 km, surface search 18km.

2 Gô 1 Gata 3 Kai Shipboard air search radar
Wavelength: 1.5m
Frequency: 200 MHz (in operation this varied from 187 – 214 MHz)
PRF: 1000 (varying in use from 750 to 1500)
Pulse length: 3 – 20 µsec
Peak power: 30 kW
DRange: 1 – 2 km
DBearing: 20°
Antenna type: Mattress 7 Gata
Beam dimensions: 34° x 60°
Production: 2 units
Development: Experimental August 1943 to February 1944. Unsatisfactory performance all research ended by April 1944.
Performance: Group of aircraft 100 km, single aircraft 50 km, surface search 18km.
Notes: Experimental development of the 21 Gô Dentan for surface gunnery. Fitted to Nachi and Yamato. Used the 7 Gata antenna with boosted power. Performance was insufficiently good to use as a fire control set. Discontinued in development. Replaced by the 22 Gô Dentan 4 Kai S.

2 Gô 1 Gata 4 Kai Shipboard air search / surface search radar
Wavelength: 1.5m
Frequency: 200 MHz (in operation this varied from 187 – 214 MHz)
PRF: 1000 (varying in use from 750 to 1500)
Pulse length: 3 – 20 µsec
Peak power: 30 kW
DRange: 1 – 2 km
DBearing: 20°
Antenna type: Mattress 7 Gata
Beam dimensions: 34° x 60°
Production: 1 unit
Development: Experimental. Follow on to the 21 Gô Dentan 4 Kai. February 44 to May 44 when development ended. Unsatisfactory performance.
Performance: Group of aircraft 100 km, single aircraft 50 km, surface search 18km.
Notes: Experimental development of the 21 Gô Dentan for surface gunnery.

2 Gô 1 Gata 5 Kai Shipboard air search / surface search radar
Wavelength: 1.5m
Frequency: 200 MHz (in operation this varied from 187 – 214 MHz)
PRF: 1000 (varying in use from 750 to 1500)
Pulse length: 3 – 20 µsec
Peak power: 30 kW
DRange: 1 – 2 km
DBearing: 20°
Antenna type: Mattress 7 Gata
Beam dimensions: 34° x 60°
Production: 1 unit
Development: Experimental February 44 to Sept 44. Unsatisfactory performance all research ended by October 1944.
Performance: Group of aircraft 100 km, single aircraft 50 km, surface search 18km.
Notes: Experimental development of the 21 Gô Dentan for surface gunnery. Fitted on the cruiser Kiso. Used the 7 Gata antenna with boosted power.

2 Gô 2 Gata 1 Kai Shipboard surface search radar
Wavelength: 10 cm
Frequency: 3 GHz (varying in service between 2.8 – 3.125 GHz)
PRF: 2500
Pulse length: 2 – 10 µsec
Peak power: 0.5kw
DRange: 700 m
DBearing: 2 - 5°
Antenna type: Double horn antenna
Beam dimensions: 38° conical
Production: Few
Development: Early 1942
Performance Surface search 22km. .
Notes: A total of approximately 400 22 Gô Dentan Kai 1 – 3 models were produced. The 1 Kai model suffered from lack of power and remained experimental. Replaced in service by the 22 Gô 2 Kai with boosted power.

2 Gô 2 Gata 2 Kai Shipboard surface search radar
Wavelength: 10 cm
Frequency: 3 GHz (varying in service between 2.8 – 3.125 GHz)
PRF: 2500
Pulse length: 2 – 10 µsec
Peak power: 2 kW
DRange: 700 m
DBearing: 2 - 5°
Antenna type: Double horn antenna
Beam dimensions: 38° conical
Production: Approximately 100 units
Development: June 1942 to December 1942
Performance Surface search 22km. Detection of large ships 35 km
Notes:

2 Gô 2 Gata 3 Kai Shipboard surface search radar
Wavelength: 10 cm
Frequency: 3 GHz (varying in service between 2.8 – 3.125 GHz)
PRF: 2500
Pulse length: 2 – 10 µsec
Peak power: 2 kW
DRange: 700 m
DBearing: 2 - 5°
Beam dimensions: 38° conical
Antenna type: Double horn antenna
Production: Approximately 200 units
Development: October 1942 to June 1943
Performance Surface search 22km. Detection of large ships 35 km
Notes:

2 Gô 2 Gata 4 Kai M Shipboard surface search radar
Wavelength: 10 cm
Frequency: 3 GHz (varying in service between 2.8 – 3.125 GHz)
PRF: 2500
Pulse length: 2 – 10 µsec
Peak power: 2 kW
DRange: 700 m
DBearing:
Antenna type: Mattress 6 Gata antenna
Beam dimensions:
Production: units
Development: December 1942 to December 1943
Performance Surface search 22km. Detection of large ships 35 km
Notes: Experimental development to produce a fire control radar. Unsuccessful.

2 Gô 2 Gata 4 Kai S Shipboard surface search and fire control radar
Wavelength: 10 cm
Frequency: 3 GHz
PRF: 2500
Pulse length: 2 – 10 µsec
Peak power: 2 kW
DRange: 100 m
DBearing: 0.5 to 1°
Antenna type: Double horn antenna. Diameter enlarged to 80 cm on receiving horn.
Beam dimensions: 38° conical
Production:
Development: December 1943 to July 1944
Performance Surface search 22km. Large units detected up to 35 km.
Notes: First successful fire control radar. Installed late war on most major fleet units. Used super heterodyne receiver replacing previous auto heterodyne unit. Voltage stabilization was provided. Service issue began in August 1944.

2 Gô 3 Gata Shipboard surface search radar
Wavelength: 58 cm
Frequency:
PRF:
Pulse length: µsec
Peak power: 5 kW
DRange: 50 m
DBearing: 1°
Antenna type: 2 x 1.7 m parabolas (1 transmit, 1 receive).
Production: 1 or 2 units
Development: October 1943 to March 44
Performance Surface search 13 km. Detection of large ships 30 km
Notes: Japanese development of the German Würzburg radar. Experimental. Development ended in March 1944.

2 Gô 4 Gata Shipboard surface search radar
Wavelength: 28 cm
Frequency:
PRF:
Pulse length:
Peak power: 5 kW
DRange:
DBearing:
Antenna type:
Beam dimensions:
Production:
Development: Early 1944 to April 45 when research stopped.
Performance:
Notes: A development of the 2 Gô 3 Gata with shortened wavelength. Experimental only.

3 Gô 2 Gata Land based fire control radar
Wavelength: 10 cm
Frequency: 3 GHz (varying in service between 2.8 – 3.125 GHz)
PRF: 2500
Pulse length: 2 – 10 µsec
Peak power: 2 kW
DRange: 100 – 250 m
DBearing: 0.5°
Antenna type: Triple square horn antenna (1 transmit over 2 receivers)
Beam dimensions: conical
Production: 30 units
Development: February 1944 to September 1944
Performance: Surface search 30 km. Detection of small ships 13 km
Notes: Derived from the 22 Gô Dentan for coastal defense use. Fixed mounting.

3 Gô 1 Gata Land based fire control radar
Wavelength: 10 cm
Frequency: 3 GHz (varying in service between 2.8 – 3.125 GHz)
PRF: 2500
Pulse length: 2 – 10 µsec
Peak power: 2 kW
DRange: 100 – 250 m
DBearing: 0.5°
Antenna type: Parabolic dish
Beam dimensions: conical
Production: Not proceeded with.
Development: Mid 1944 to March 1945.
Performance:
Notes: A development of the 32 Gô Dentan set. Experimental only.

3 Gô 3 Gata Land based fire control radar
Wavelength: 10 cm
Frequency: 3 GHz (varying in service between 2.8 – 3.125 GHz)
PRF: 2500
Pulse length: 2 – 10 µsec
Peak power: 2 kW
DRange: 100 – 250 m
DBearing: 0.5°
Antenna type: Triple square horn antenna (1 transmit over 2 receivers)
Beam dimensions: conical
Production: Not proceeded with.
Development: Mid 1944 to January 1945.
Performance:
Notes: A development of the 32 Gô Dentan set. Experimental only.

4 Gô 1 Gata Land based AA search and fire control radar
Wavelength: 1.5 m
Frequency: 200 MHz
PRF: 2000
Pulse length: 3 µsec
Peak power: 13 kW
DRange: 50 – 100 m
DBearing: 1 – 1.5°
Antenna type:
Beam dimensions:
Production: Approximately 80 units
Development: October 1942 to August 1943
Performance: Detection of single aircraft at 20 km.
Notes: Developed from US SCR 286 and British GL II gun laying radars captured in the Philippines and Malaysia.

4 Gô 2 Gata Land based AA search and fire control radar
Wavelength: 1.5 m
Frequency: 200 MHz
PRF: 1000
Pulse length: 3 µsec
Peak power: 30 kW
DRange: 50 - 100 m
DBearing: 0.5°
Antenna type:
Beam dimensions:
Production:
Development:
Performance: Range on group of aircraft 30 – 40 km. Single aircraft at 15 – 20 km.
Notes: Improved development of the 41 Gô Dentan set.

4 Gô 3 Gata Land based air search radar
Wavelength: 1.5 m
Frequency: 200 MHz
PRF: 1000
Pulse length: 2 µsec
Peak power: 5 kW
DRange:
DBearing:
Antenna type:
Beam dimensions:
Production:
Development:
Performance:
Notes: Direct copy of the Army Tachi 1 set. Used for searchlight control. Unsatisfactory performance.

6 Gô 1 Gata Airborne surface search radar
Wavelength: 2 m
Frequency: 150 MHz (140 – 160 MHz in service)
PRF: 1000 (varies between 700 and 1200 in service)
Pulse length: 3 - 10 µsec
Peak power: 3 - 6 kW
DRange:
DBearing:
Antenna type: Yagi array along aircraft sides.
Beam dimensions:
Production: Over 2000 units.
Development:
Performance: Large surface targets up to 70 km.
Notes: Primary airborne search radar for IJN aircraft. Manufacturer’s designation H-6.

3 Gyoku Airborne intercept radar
Wavelength: 2 m
Frequency: 150 MHz (140 – 160 MHz in service)
PRF: 1000 (varies between 700 and 1200 in service)
Pulse length:
Peak power:
DRange:
DBearing:
Antenna type: Yagi array
Beam dimensions:
Production:
Development: Under development from late 1944.
Performance:
Notes:

Japanese ESM sets
Officially these were known as Denpa Tansakuki.
Kai 3 Metric wavelength ESM receiver
Detection range: 75 cm - 4 m
Detection frequency bandwidth:
Detection range: 300 km
Production:
Development: From early 1943. In service June 1943.
Notes: Used 2 “Metox” type non-directional antennas plus one “tennis racket” directional antenna. The two non-directional antennas were placed on the bridge wings of the ship while the rotating directional antenna was amidships. Manufacturer’s designation: E-27

3 Gata Centimetric wavelength ESM receiver
Detection range: 3 - 75 cm
Detection frequency bandwidth:
Detection range:
Production:
Development: From late 1943. In service January 1944.
Notes: Used the 49 Gô 4.5 cm parabolic dish antenna. Super heterodyne receiver.

Bibliography
Friedman, Norman Naval Radar, Conway Maritime Press, London, 1981
Nakajima, Dr. S. The History of Japanese Radar Development to 1945 in Radar Development to 1945, Russell Burns ed., Peter Peregrinus, London, 1988.
Price, Alfred The history of US Electronic Warfare, vol. 1, The Association of Old Crows, 1984
 
Last edited:
Could you format your post to be not as big? There are many empty spaces beteween the texrs often 3 lines, it makes the post unnecessary big.

The Type 13 or 1 Go 3 Gata was not a land only radar set as almost every IJN shiptype used them. They were common sights on the masts.
 
Tzoli said:
Could you format your post to be not as big? There are many empty spaces beteween the texrs often 3 lines, it makes the post unnecessary big.

The Type 13 or 1 Go 3 Gata was not a land only radar set as almost every IJN shiptype used them. They were common sights on the masts.
Click to expand...
Better? Copied and pasted my Word file for that post
 

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